java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrcat-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:08:14,477 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:08:14,479 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:08:14,494 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:08:14,495 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:08:14,496 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:08:14,497 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:08:14,499 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:08:14,501 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:08:14,502 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:08:14,502 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:08:14,502 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:08:14,503 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:08:14,504 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:08:14,505 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:08:14,507 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:08:14,510 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:08:14,512 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:08:14,514 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:08:14,516 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:08:14,519 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:08:14,519 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:08:14,519 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:08:14,520 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:08:14,521 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:08:14,523 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:08:14,523 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:08:14,524 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:08:14,524 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:08:14,524 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:08:14,525 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:08:14,526 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-24 23:08:14,535 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:08:14,536 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:08:14,536 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:08:14,537 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:08:14,537 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:08:14,537 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:08:14,537 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:08:14,537 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:08:14,538 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:08:14,538 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:08:14,538 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:08:14,539 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:08:14,539 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:08:14,539 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:08:14,539 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:08:14,539 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:08:14,540 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:08:14,540 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:08:14,540 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:08:14,540 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:08:14,540 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:08:14,541 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:08:14,541 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:08:14,541 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:08:14,541 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:08:14,541 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:08:14,542 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:08:14,542 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:08:14,542 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:08:14,542 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:08:14,542 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:08:14,543 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:08:14,543 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:08:14,543 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:08:14,544 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:08:14,544 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:08:14,581 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:08:14,596 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:08:14,601 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:08:14,602 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:08:14,603 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:08:14,604 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrcat-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:08:14,789 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:08:14,796 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:08:14,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:08:14,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:08:14,804 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:08:14,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:08:14" (1/1) ... [2018-01-24 23:08:14,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e47ad9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:08:14, skipping insertion in model container [2018-01-24 23:08:14,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:08:14" (1/1) ... [2018-01-24 23:08:14,828 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:08:14,868 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:08:14,992 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:08:15,008 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:08:15,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:08:15 WrapperNode [2018-01-24 23:08:15,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:08:15,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:08:15,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:08:15,017 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:08:15,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:08:15" (1/1) ... [2018-01-24 23:08:15,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:08:15" (1/1) ... [2018-01-24 23:08:15,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:08:15" (1/1) ... [2018-01-24 23:08:15,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:08:15" (1/1) ... [2018-01-24 23:08:15,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:08:15" (1/1) ... [2018-01-24 23:08:15,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:08:15" (1/1) ... [2018-01-24 23:08:15,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:08:15" (1/1) ... [2018-01-24 23:08:15,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:08:15,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:08:15,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:08:15,051 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:08:15,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:08:15" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:08:15,099 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:08:15,099 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:08:15,100 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrcat [2018-01-24 23:08:15,100 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:08:15,100 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:08:15,100 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:08:15,100 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:08:15,100 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:08:15,100 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:08:15,100 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:08:15,100 INFO L128 BoogieDeclarations]: Found specification of procedure cstrcat [2018-01-24 23:08:15,100 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:08:15,101 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:08:15,101 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:08:15,326 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:08:15,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:08:15 BoogieIcfgContainer [2018-01-24 23:08:15,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:08:15,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:08:15,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:08:15,329 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:08:15,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:08:14" (1/3) ... [2018-01-24 23:08:15,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c1bbf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:08:15, skipping insertion in model container [2018-01-24 23:08:15,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:08:15" (2/3) ... [2018-01-24 23:08:15,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c1bbf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:08:15, skipping insertion in model container [2018-01-24 23:08:15,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:08:15" (3/3) ... [2018-01-24 23:08:15,332 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:08:15,338 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:08:15,344 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2018-01-24 23:08:15,391 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:08:15,392 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:08:15,392 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:08:15,392 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:08:15,392 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:08:15,392 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:08:15,392 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:08:15,393 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:08:15,394 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:08:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-01-24 23:08:15,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-24 23:08:15,423 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:08:15,424 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:08:15,424 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:08:15,429 INFO L82 PathProgramCache]: Analyzing trace with hash 104454547, now seen corresponding path program 1 times [2018-01-24 23:08:15,432 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:08:15,492 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:15,493 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:08:15,493 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:15,493 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:08:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:08:15,553 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:08:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:08:15,613 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:08:15,613 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 23:08:15,613 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:08:15,616 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:08:15,628 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:08:15,628 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:08:15,630 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2018-01-24 23:08:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:08:15,815 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2018-01-24 23:08:15,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:08:15,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-24 23:08:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:08:15,828 INFO L225 Difference]: With dead ends: 72 [2018-01-24 23:08:15,828 INFO L226 Difference]: Without dead ends: 46 [2018-01-24 23:08:15,831 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:08:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-24 23:08:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-24 23:08:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-24 23:08:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2018-01-24 23:08:15,880 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 11 [2018-01-24 23:08:15,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:08:15,880 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2018-01-24 23:08:15,881 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:08:15,881 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2018-01-24 23:08:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 23:08:15,882 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:08:15,882 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:08:15,882 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:08:15,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1017224676, now seen corresponding path program 1 times [2018-01-24 23:08:15,883 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:08:15,884 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:15,884 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:08:15,884 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:15,884 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:08:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:08:15,911 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:08:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:08:16,021 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:08:16,021 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:08:16,022 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:08:16,024 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:08:16,024 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:08:16,024 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:08:16,024 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 4 states. [2018-01-24 23:08:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:08:16,093 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2018-01-24 23:08:16,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:08:16,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-24 23:08:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:08:16,094 INFO L225 Difference]: With dead ends: 46 [2018-01-24 23:08:16,095 INFO L226 Difference]: Without dead ends: 45 [2018-01-24 23:08:16,096 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:08:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-24 23:08:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-24 23:08:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-24 23:08:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2018-01-24 23:08:16,103 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 15 [2018-01-24 23:08:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:08:16,103 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2018-01-24 23:08:16,103 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:08:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2018-01-24 23:08:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 23:08:16,104 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:08:16,104 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:08:16,105 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:08:16,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1017224677, now seen corresponding path program 1 times [2018-01-24 23:08:16,105 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:08:16,106 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:16,106 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:08:16,106 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:16,107 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:08:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:08:16,126 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:08:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:08:16,314 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:08:16,314 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:08:16,314 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:08:16,314 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:08:16,315 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:08:16,315 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:08:16,315 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 6 states. [2018-01-24 23:08:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:08:16,482 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-01-24 23:08:16,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:08:16,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-01-24 23:08:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:08:16,484 INFO L225 Difference]: With dead ends: 45 [2018-01-24 23:08:16,484 INFO L226 Difference]: Without dead ends: 44 [2018-01-24 23:08:16,485 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:08:16,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-24 23:08:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-24 23:08:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-24 23:08:16,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2018-01-24 23:08:16,491 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 15 [2018-01-24 23:08:16,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:08:16,491 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2018-01-24 23:08:16,491 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:08:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2018-01-24 23:08:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:08:16,492 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:08:16,492 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:08:16,492 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:08:16,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1469193927, now seen corresponding path program 1 times [2018-01-24 23:08:16,492 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:08:16,493 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:16,493 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:08:16,494 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:16,494 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:08:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:08:16,510 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:08:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:08:16,554 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:08:16,554 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:08:16,554 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:08:16,555 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:08:16,555 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:08:16,555 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:08:16,555 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 4 states. [2018-01-24 23:08:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:08:16,629 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-01-24 23:08:16,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:08:16,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 23:08:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:08:16,636 INFO L225 Difference]: With dead ends: 44 [2018-01-24 23:08:16,636 INFO L226 Difference]: Without dead ends: 43 [2018-01-24 23:08:16,637 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:08:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-24 23:08:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-24 23:08:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-24 23:08:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-01-24 23:08:16,656 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 16 [2018-01-24 23:08:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:08:16,657 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-01-24 23:08:16,657 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:08:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-01-24 23:08:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:08:16,658 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:08:16,658 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:08:16,658 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:08:16,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1469193928, now seen corresponding path program 1 times [2018-01-24 23:08:16,659 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:08:16,660 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:16,660 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:08:16,660 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:16,660 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:08:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:08:16,681 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:08:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:08:16,756 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:08:16,756 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:08:16,756 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:08:16,757 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:08:16,757 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:08:16,757 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:08:16,758 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 6 states. [2018-01-24 23:08:17,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:08:17,019 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-01-24 23:08:17,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:08:17,020 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-01-24 23:08:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:08:17,023 INFO L225 Difference]: With dead ends: 59 [2018-01-24 23:08:17,023 INFO L226 Difference]: Without dead ends: 58 [2018-01-24 23:08:17,024 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:08:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-24 23:08:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2018-01-24 23:08:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-24 23:08:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-01-24 23:08:17,044 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 16 [2018-01-24 23:08:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:08:17,045 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-01-24 23:08:17,046 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:08:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-01-24 23:08:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:08:17,047 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:08:17,047 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:08:17,048 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:08:17,048 INFO L82 PathProgramCache]: Analyzing trace with hash 659847302, now seen corresponding path program 1 times [2018-01-24 23:08:17,048 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:08:17,049 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:17,049 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:08:17,049 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:17,050 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:08:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:08:17,062 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:08:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:08:17,151 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:08:17,151 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:08:17,151 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:08:17,151 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:08:17,152 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:08:17,152 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:08:17,152 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 7 states. [2018-01-24 23:08:17,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:08:17,245 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2018-01-24 23:08:17,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 23:08:17,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-01-24 23:08:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:08:17,246 INFO L225 Difference]: With dead ends: 50 [2018-01-24 23:08:17,246 INFO L226 Difference]: Without dead ends: 49 [2018-01-24 23:08:17,246 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-01-24 23:08:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-24 23:08:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2018-01-24 23:08:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-24 23:08:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-01-24 23:08:17,252 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 16 [2018-01-24 23:08:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:08:17,253 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2018-01-24 23:08:17,253 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:08:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2018-01-24 23:08:17,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 23:08:17,254 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:08:17,254 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:08:17,254 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:08:17,254 INFO L82 PathProgramCache]: Analyzing trace with hash -262056781, now seen corresponding path program 1 times [2018-01-24 23:08:17,254 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:08:17,255 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:17,256 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:08:17,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:17,256 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:08:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:08:17,270 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:08:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:08:17,307 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:08:17,307 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:08:17,307 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:08:17,308 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:08:17,308 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:08:17,308 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:08:17,308 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2018-01-24 23:08:17,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:08:17,427 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-01-24 23:08:17,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:08:17,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-01-24 23:08:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:08:17,428 INFO L225 Difference]: With dead ends: 42 [2018-01-24 23:08:17,428 INFO L226 Difference]: Without dead ends: 41 [2018-01-24 23:08:17,429 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:08:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-24 23:08:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-24 23:08:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-24 23:08:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-01-24 23:08:17,432 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 20 [2018-01-24 23:08:17,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:08:17,433 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-01-24 23:08:17,433 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:08:17,433 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-01-24 23:08:17,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 23:08:17,434 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:08:17,434 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:08:17,434 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:08:17,435 INFO L82 PathProgramCache]: Analyzing trace with hash -262056780, now seen corresponding path program 1 times [2018-01-24 23:08:17,435 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:08:17,436 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:17,436 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:08:17,436 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:17,436 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:08:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:08:17,448 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:08:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:08:17,525 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:08:17,525 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:08:17,525 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:08:17,526 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:08:17,526 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:08:17,526 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:08:17,526 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2018-01-24 23:08:17,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:08:17,670 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2018-01-24 23:08:17,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 23:08:17,670 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-01-24 23:08:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:08:17,671 INFO L225 Difference]: With dead ends: 47 [2018-01-24 23:08:17,671 INFO L226 Difference]: Without dead ends: 46 [2018-01-24 23:08:17,672 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-01-24 23:08:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-24 23:08:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2018-01-24 23:08:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-24 23:08:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-01-24 23:08:17,678 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 20 [2018-01-24 23:08:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:08:17,678 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-01-24 23:08:17,678 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:08:17,678 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-01-24 23:08:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 23:08:17,679 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:08:17,679 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:08:17,679 INFO L371 AbstractCegarLoop]: === Iteration 9 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:08:17,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1316966177, now seen corresponding path program 1 times [2018-01-24 23:08:17,679 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:08:17,680 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:17,681 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:08:17,681 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:17,681 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:08:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:08:17,694 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:08:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:08:17,878 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:08:17,878 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:08:17,879 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-01-24 23:08:17,880 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [6], [8], [10], [15], [43], [48], [52], [58], [65], [66], [67], [68], [69], [70], [73], [84], [85], [86], [88] [2018-01-24 23:08:17,926 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:08:17,927 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 23:08:55,217 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 23:08:55,218 INFO L268 AbstractInterpreter]: Visited 22 different actions 26 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-01-24 23:08:55,259 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-24 23:08:55,259 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:08:55,259 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 23:08:55,303 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:08:55,303 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 23:08:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:08:55,374 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 23:08:55,425 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-01-24 23:08:55,428 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 23:08:55,428 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 23:08:55,430 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:08:55,432 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:08:55,432 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2018-01-24 23:08:55,516 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-01-24 23:08:55,533 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-01-24 23:08:55,533 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 23:08:55,551 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:08:55,552 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:08:55,553 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2018-01-24 23:08:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:08:55,564 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 23:08:55,578 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2018-01-24 23:08:55,616 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2018-01-24 23:08:55,616 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 23:08:55,618 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:08:55,619 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:08:55,619 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:13, output treesize:3 [2018-01-24 23:08:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:08:55,658 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-24 23:08:55,658 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [7] total 13 [2018-01-24 23:08:55,658 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:08:55,658 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:08:55,659 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:08:55,659 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-01-24 23:08:55,659 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 7 states. [2018-01-24 23:08:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:08:55,940 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2018-01-24 23:08:55,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:08:55,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-01-24 23:08:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:08:55,941 INFO L225 Difference]: With dead ends: 93 [2018-01-24 23:08:55,942 INFO L226 Difference]: Without dead ends: 70 [2018-01-24 23:08:55,942 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-01-24 23:08:55,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-24 23:08:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2018-01-24 23:08:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-24 23:08:55,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2018-01-24 23:08:55,950 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 23 [2018-01-24 23:08:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:08:55,950 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2018-01-24 23:08:55,950 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:08:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2018-01-24 23:08:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 23:08:55,951 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:08:55,952 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:08:55,952 INFO L371 AbstractCegarLoop]: === Iteration 10 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:08:55,952 INFO L82 PathProgramCache]: Analyzing trace with hash 37102499, now seen corresponding path program 1 times [2018-01-24 23:08:55,952 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:08:55,953 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:55,953 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:08:55,954 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:08:55,954 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:08:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:08:55,967 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:08:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:08:56,189 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:08:56,189 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:08:56,190 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-01-24 23:08:56,190 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [6], [8], [10], [15], [43], [48], [52], [60], [65], [66], [67], [68], [69], [70], [73], [84], [85], [86], [88] [2018-01-24 23:08:56,191 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:08:56,191 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-01-24 23:09:12,524 WARN L571 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-01-24 23:09:12,525 WARN L157 AbstractInterpreter]: Abstract interpretation run out of time [2018-01-24 23:09:12,525 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-24 23:09:12,525 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:09:12,525 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 23:09:12,531 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:09:12,531 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 23:09:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:09:12,572 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 23:09:12,574 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-24 23:09:12,575 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-24 23:09:12,581 WARN L187 ceAbstractionStarter]: Timeout [2018-01-24 23:09:12,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 11:09:12 BoogieIcfgContainer [2018-01-24 23:09:12,581 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 23:09:12,582 INFO L168 Benchmark]: Toolchain (without parser) took 57792.98 ms. Allocated memory was 303.0 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 262.9 MB in the beginning and 875.1 MB in the end (delta: -612.1 MB). Peak memory consumption was 970.2 MB. Max. memory is 5.3 GB. [2018-01-24 23:09:12,583 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 303.0 MB. Free memory is still 268.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 23:09:12,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.48 ms. Allocated memory is still 303.0 MB. Free memory was 261.9 MB in the beginning and 251.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-24 23:09:12,584 INFO L168 Benchmark]: Boogie Preprocessor took 34.11 ms. Allocated memory is still 303.0 MB. Free memory was 251.8 MB in the beginning and 249.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-24 23:09:12,584 INFO L168 Benchmark]: RCFGBuilder took 276.01 ms. Allocated memory is still 303.0 MB. Free memory was 249.8 MB in the beginning and 231.8 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 5.3 GB. [2018-01-24 23:09:12,584 INFO L168 Benchmark]: TraceAbstraction took 57254.15 ms. Allocated memory was 303.0 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 230.8 MB in the beginning and 875.1 MB in the end (delta: -644.3 MB). Peak memory consumption was 938.0 MB. Max. memory is 5.3 GB. [2018-01-24 23:09:12,586 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 303.0 MB. Free memory is still 268.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 219.48 ms. Allocated memory is still 303.0 MB. Free memory was 261.9 MB in the beginning and 251.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 34.11 ms. Allocated memory is still 303.0 MB. Free memory was 251.8 MB in the beginning and 249.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 276.01 ms. Allocated memory is still 303.0 MB. Free memory was 249.8 MB in the beginning and 231.8 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 5.3 GB. * TraceAbstraction took 57254.15 ms. Allocated memory was 303.0 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 230.8 MB in the beginning and 875.1 MB in the end (delta: -644.3 MB). Peak memory consumption was 938.0 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 21 LocStat_MAX_WEQGRAPH_SIZE : 5 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 251 LocStat_NO_SUPPORTING_DISEQUALITIES : 48 LocStat_NO_DISJUNCTIONS : -42 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 28 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 57 TransStat_NO_SUPPORTING_DISEQUALITIES : 5 TransStat_NO_DISJUNCTIONS : 29 TransStat_MAX_NO_DISJUNCTIONS : 2 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 3.397218 RENAME_VARIABLES(MILLISECONDS) : 0.320804 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 3.322239 PROJECTAWAY(MILLISECONDS) : 0.594644 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.081665 DISJOIN(MILLISECONDS) : 0.413439 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.361282 ADD_EQUALITY(MILLISECONDS) : 0.018604 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.017890 #CONJOIN_DISJUNCTIVE : 49 #RENAME_VARIABLES : 72 #UNFREEZE : 0 #CONJOIN : 95 #PROJECTAWAY : 66 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 6 #RENAME_VARIABLES_DISJUNCTIVE : 69 #ADD_EQUALITY : 59 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 3 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 543). Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 545). Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 543). Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 545). Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 545). Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 545). Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 566). Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 565). Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 566). Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 565). Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - TimeoutResultAtElement [Line: 549]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 549). Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 49 locations, 11 error locations. TIMEOUT Result, 57.1s OverallTime, 10 OverallIterations, 2 TraceHistogramMax, 1.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 356 SDtfs, 275 SDslu, 698 SDs, 0 SdLazy, 387 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 53.7s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 33 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 187 ConstructedInterpolants, 0 QuantifiedInterpolants, 12309 SizeOfPredicates, 12 NumberOfNonLiveVariables, 116 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 11 InterpolantComputations, 10 PerfectInterpolantSequences, 4/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcat-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-24_23-09-12-597.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcat-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-VPDomainBenchmark-0-2018-01-24_23-09-12-597.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcat-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-0-2018-01-24_23-09-12-597.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcat-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-24_23-09-12-597.csv Completed graceful shutdown